Global Patent Index - EP 0852578 B1

EP 0852578 B1 2000-09-06 - METHOD FOR PREPARING CERTAIN ACETONITRILES

Title (en)

METHOD FOR PREPARING CERTAIN ACETONITRILES

Title (de)

VERFAHREN ZUR HERSTELLUNG BESTIMMTER ACETONITRILEN

Title (fr)

PROCEDE DE PREPARATION DE CERTAINS ACETONITRILES

Publication

EP 0852578 B1 (EN)

Application

EP 96915869 A

Priority

  • GB 9509930 A
  • US 9607108 W

Abstract (en)

[origin: WO9636594A1] The invention relates to a process for converting a benzaldehyde to a cyanohydrin in an aqueous medium by adding an alkali metal bisulfite to a solution of the benzaldehyde, then adding an alkali metal cyanide to this mixture, followed by a second charge of alkali metal bisulfite. The reaction is conducted at a pH between 6.5 to 7.5 and a temperature of 0 to 30 degrees centigrade.

IPC 1-7 (main, further and additional classification)

C07C 253/08

IPC 8 full level (invention and additional information)

C07B 61/00 (2006.01); C07C 253/08 (2006.01); C07C 255/36 (2006.01); C07C 255/37 (2006.01)

CPC (invention and additional information)

C07C 253/00 (2013.01); C07C 255/36 (2013.01)

Combination set (CPC)

C07C 253/00 + C07C 255/36

Designated contracting state (EPC)

BE CH DE DK ES FR GB IT LI NL

EPO simple patent family

WO 9636594 A1 19961121; DE 69610213 D1 20001012; DE 69610213 T2 20010104; DK 0852578 T3 20001211; EP 0852578 A1 19980715; EP 0852578 A4 19980715; EP 0852578 B1 20000906; ES 2149479 T3 20001101; GB 9509930 D0 19950712; JP H11505256 A 19990518; US 6040471 A 20000321; US 6225491 B1 20010501

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